NHTSA Complaint #11690260 — 2017 CHEVROLET SILVERADO 1500

Upon reversing the vehicle and apply the brake, as if in a parking lot or driveway, if pushing the brake pedal more than twice the pedal becomes hard and the vehicle becomes hard to stop without and excessive amount of force being applied to the brake pedal. If depressing the brake pedal more than 3 times, it is almost impossible to stop the vehicle with it coasting several feet. Checked for a recall, there is no recall, but there is a service bulletin that pertains to this issue concerning the brake assist vacuum pump booster, N182202780-01 and N192268490, for the 2014-2018 Chevy Silverado. An update to the electronic brake control module was completed on 2019-09-23, but such calibration seems to not be enough to resolve the issue.